LTX-2.3 ComfyUI
Unlock the peak of open-source video generation. From basic templates to professional workflows.
Step-by-Step Running Guide
Step 1: Environment
Install "ComfyUI-LTXVideo" via Manager and restart.
Step 2: Load Models
Put models in correct paths and refresh.
Step 3: Import Workflow
Drag & Drop JSON into ComfyUI browser.
Model Installation Paths
ComfyUI/models/checkpoints/LTX-Video/ ComfyUI/models/upscale_models/ ComfyUI/models/loras/ Why Run LTX-2.3 in ComfyUI?
ComfyUI is the most powerful platform for LTX-2.3. Control two-stage upscaling, audio sync, and multi-modal ControlNet with ease.
Deep Dive: Two-Stage Workflow
The recommended way for Distilled models to balance speed and high-frequency details.
Stage 1: Latent Base
Generate global motion and structure at lower resolution (e.g., 544x960).
Stage 2: Spatial Upscale
Inject high-frequency textures and sharpen edges using spatial-upscaler.
Hardware Requirements
Entry-Level (8-12GB VRAM)
Use GGUF/FP8. Recommended: 720p vertical, single stage.
Mainstream (16-24GB VRAM)
Best for Two-Stage. 1080p output in 30-60s.
Production (24GB+ VRAM)
Run bf16 Dev full model. Supports 4K spatial + temporal upscale.
Prompt Library (Copyable)
"A low-angle close-up shot of a cyberpunk detective walking through a neon-lit rain-slicked street, volumetric lighting, 8k resolution, cinematic grain, sharp textures."
"A majestic waterfall cascading down a lush green mountain, early morning mist, slow-motion drone shot, hyper-realistic, 4k, sunlight filtering through trees."
"A professional dancer performing hip-hop on a rooftop at sunset, fluid motion, dynamic camera movement, vibrant colors, shallow depth of field."
1. Official Built-in Templates
Built-in templates for quick start.
Steps:
- Update ComfyUI to latest (≥ 0.16.1).
- Menu -> Template Library, search "LTX-2.3".
- Load T2V or I2V template.
2. Official Custom Node Workflows
Based on ComfyUI-LTXVideo with full feature support.
3. Low VRAM / GGUF Solutions
Optimized for 8-12GB VRAM cards.
Troubleshooting (FAQ)
Q: "Model Not Found"?
A: Check if models are in LTX-Video subfolder with .safetensors extension.
Q: Black screen or noisy video?
A: Distilled model requires CFG=1.0. Dev model suggests 3.0-5.0.
Q: Out of Memory?
A: Reduce resolution or use GGUF quantized versions.
Key Parameters (Distilled)
Required Resources
"LTX-2.3 is the game changer for open-source AI video in ComfyUI."